<?php

class Installer_Dependencies {

	private $uploading_allowed = null;
	private $is_win_paths_exception = array();


	function __construct() {

		add_action( 'admin_init', array( $this, 'prevent_plugins_update_on_plugins_page' ), 100 );


		global $pagenow;
		if ( $pagenow == 'update.php' ) {
			if ( isset( $_GET['action'] ) && $_GET['action'] == 'update-selected' ) {
				add_action( 'admin_head', array(
					$this,
					'prevent_plugins_update_on_updates_screen'
				) );         //iframe/bulk
			} else {
				add_action( 'all_admin_notices', array(
					$this,
					'prevent_plugins_update_on_updates_screen'
				) );  //regular/singular
			}
		}
		add_action( 'wp_ajax_update-plugin', array(
			$this,
			'prevent_plugins_update_on_updates_screen'
		), 0 ); // high priority, before WP

	}

	public function is_win_paths_exception( $repository_id ) {

		if ( ! isset( $this->is_win_paths_exception[ $repository_id ] ) ) {

			$this->is_win_paths_exception[ $repository_id ] = false;

			if ( strtoupper( substr( PHP_OS, 0, 3 ) ) === 'WIN' ) {

				$windows_max_path_length = 256;
				$longest_path['wpml']    = 109;
				$longest_path['toolset'] = 99;

				$margin = 15;

				$upgrade_path_length = strlen( WP_CONTENT_DIR . '/upgrade' );

				$installer_settings = WP_Installer()->settings;

                if ( isset($installer_settings['repositories'][$repository_id]['data']) && is_array( $installer_settings['repositories'][$repository_id]['data']['downloads']['plugins'] ) ) {
                    $a_plugin = current( $installer_settings['repositories'][$repository_id]['data']['downloads']['plugins'] );
                    $url = WP_Installer()->append_site_key_to_download_url( $a_plugin['url'], 'xxxxxx', $repository_id );
                    $tmpfname = wp_tempnam( $url );

					$tmpname_length = strlen( basename( $tmpfname ) ) - 4; // -.tmp

					if ( $upgrade_path_length + $tmpname_length + $longest_path[ $repository_id ] + $margin > $windows_max_path_length ) {

						$this->is_win_paths_exception[ $repository_id ] = true;

					}

				}


			}

		}

		return $this->is_win_paths_exception[ $repository_id ];

	}

	public function is_uploading_allowed() {

		if ( ! isset( $this->uploading_allowed ) ) {
			require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
			require_once WP_Installer()->plugin_path() . '/includes/class-installer-upgrader-skins.php';

			$upgrader_skins = new Installer_Upgrader_Skins(); //use our custom (mute) Skin
			$upgrader       = new Plugin_Upgrader( $upgrader_skins );

			ob_start();
			$res = $upgrader->fs_connect( array( WP_CONTENT_DIR, WP_PLUGIN_DIR ) );
			ob_end_clean();

			if ( ! $res || is_wp_error( $res ) ) {
				$this->uploading_allowed = false;
			} else {
				$this->uploading_allowed = true;
			}
		}

		return $this->uploading_allowed;

	}

	public function cant_download( $repository_id ) {

		return ! $this->is_uploading_allowed() || $this->is_win_paths_exception( $repository_id );

	}

	public function win_paths_exception_message() {
		return __( 'Downloading is not possible. WordPress cannot create required folders because of the
                                        256 characters limitation of the current Windows environment.', 'installer' );
	}

	public function prevent_plugins_update_on_plugins_page() {

		$plugins = get_site_transient( 'update_plugins' );
		if ( isset( $plugins->response ) && is_array( $plugins->response ) ) {
			$plugins_with_updates = array_keys( $plugins->response );
		}

		if ( ! empty( $plugins_with_updates ) ) {

			$plugins = get_plugins();

			$installer_settings = WP_Installer()->settings;
			if ( isset( $installer_settings['repositories'] ) ) {
				foreach ( $installer_settings['repositories'] as $repository_id => $repository ) {

					if ( $this->is_win_paths_exception( $repository_id ) ) {

						$repositories_plugins = array();
						foreach ( $repository['data']['packages'] as $package ) {
							foreach ( $package['products'] as $product ) {
								foreach ( $product['plugins'] as $plugin_slug ) {
									$download = $installer_settings['repositories'][ $repository_id ]['data']['downloads']['plugins'][ $plugin_slug ];
									if ( empty( $download['free-on-wporg'] ) ) {
										$repositories_plugins[ $download['slug'] ] = $download['name'];
									}
								}
							}
						}

						foreach ( $plugins as $plugin_id => $plugin ) {

							if ( in_array( $plugin_id, $plugins_with_updates ) ) {

								$wp_plugin_slug = dirname( $plugin_id );
								if ( empty( $wp_plugin_slug ) ) {
									$wp_plugin_slug = basename( $plugin_id, '.php' );
								}

								foreach ( $repositories_plugins as $slug => $name ) {
									if ( $wp_plugin_slug == $slug || $name == $plugin['Name'] || $name == $plugin['Title'] ) { //match order: slug, name, title

										remove_action( "after_plugin_row_$plugin_id", 'wp_plugin_update_row', 10, 2 );
										add_action( "after_plugin_row_$plugin_id", array(
											$this,
											'wp_plugin_update_row_win_exception',
										), 10, 2 );

									}
								}

							}

						}

					}


				}
			}

		}

	}

	public function wp_plugin_update_row_win_exception() {
		$wp_list_table = _get_list_table( 'WP_Plugins_List_Table' );
		echo '<tr class="plugin-update-tr">';
		echo '<td  class="plugin-update colspanchange" colspan="' . esc_attr( $wp_list_table->get_column_count() ) .
		     '"><div class="update-message">' . $this->win_paths_exception_message() . '</div></td>';
		echo '</tr>';
	}

	public function prevent_plugins_update_on_updates_screen() {

		if ( isset( $_REQUEST['action'] ) ) {

			$action = isset( $_REQUEST['action'] ) ? sanitize_text_field( $_REQUEST['action'] ) : '';

			$installer_settings = WP_Installer()->settings;

			//bulk mode
			if ( 'update-selected' == $action ) {

				global $plugins;

				if ( isset( $plugins ) && is_array( $plugins ) ) {

					foreach ( $plugins as $k => $plugin ) {

						$wp_plugin_slug = dirname( $plugin );

						foreach ( $installer_settings['repositories'] as $repository_id => $repository ) {

							if ( $this->is_win_paths_exception( $repository_id ) ) {

								foreach ( $repository['data']['packages'] as $package ) {

									foreach ( $package['products'] as $product ) {

										foreach ( $product['plugins'] as $plugin_slug ) {

											$download = $installer_settings['repositories'][ $repository_id ]['data']['downloads']['plugins'][ $plugin_slug ];

											if ( $download['slug'] == $wp_plugin_slug && empty( $download['free-on-wporg'] ) ) {

												echo '<div class="updated error"><p>' . $this->win_paths_exception_message() .
												     ' <strong>(' . $download['name'] . ')</strong>' . '</p></div>';
												unset( $plugins[ $k ] );

												break( 3 );

											}

										}

									}

								}


							}

						}

					}

				}

			}


			if ( 'upgrade-plugin' == $action || 'update-plugin' == $action ) {

				$plugin = isset( $_REQUEST['plugin'] ) ? trim( sanitize_text_field( $_REQUEST['plugin'] ) ) : '';

				$wp_plugin_slug = dirname( $plugin );

				foreach ( $installer_settings['repositories'] as $repository_id => $repository ) {

					if ( $this->is_win_paths_exception( $repository_id ) ) {
						foreach ( $repository['data']['packages'] as $package ) {

							foreach ( $package['products'] as $product ) {

								foreach ( $product['plugins'] as $plugin_slug ) {
									$download = $installer_settings['repositories'][ $repository_id ]['data']['downloads']['plugins'][ $plugin_slug ];

									//match by folder, will change to match by name and folder
									if ( $download['slug'] == $wp_plugin_slug && empty ( $download['free-on-wporg'] ) ) {

										echo '<div class="updated error"><p>' . $this->win_paths_exception_message() . '</p></div>';

										echo '<div class="wrap">';
										echo '<h2>' . __( 'Update Plugin' ) . '</h2>';
										echo '<a href="' . admin_url( 'update-core.php' ) . '">' . __( 'Return to the updates page', 'installer' ) . '</a>';
										echo '</div>';
										require_once( ABSPATH . 'wp-admin/admin-footer.php' );
										exit;

									}

								}

							}

						}
					}

				}

			}
		}

	}


}



